Process and apparatus for removing water and air from paper-machine driers



Feb- 9, 1926. 1,572,118

v. D. SIMONS PRscEss AND APPARATUS FOR REMOVING WATER AND AIR FROM PAPERmomma mums Filed July 15, 1920 WITNESS: INVENTOR.

A TTORNEY.

Patented Feb. 9, 1926.

UNITED STATES.

PATENT OFFICE.

warm 1). smons; or CHICAGO, IL'LInoIsu rnocnss Ann Arrenarus on. nnmovmoWAT R AND AIR rnom PAPER-MACHINE names;

Application filed July 15,1920 Serial 80.396524.

To all whom'z't may concgnm:

a citizen of the UnitedStates, residin at tate of Illinois, haveinvented certain new and useful Improvements in Processes and Apparatusfor Removing Water and Air from' Paper-Machine Driers, of which thefollowing is a specification.

h's invention relates a process and apparatus for removing. air andwater from paper machine driers; The principal object oi the inventionis to provide a more efiicient apparatus for and proce.

ess of removing the air and condensation,

and in particular to reducethe steampres: I sure ordinarily carried inthe drier while in creasing the capacity. A further 'pbject is to effecta reduction" in the steam consumption per unit pfpaper dried. Otherobjects relat'ejtd'variouss features of construe Sillw tion and;operation which will appear 'more clearly hereinafter.

i The nature ;of the invention willbeunder stood from the followingspecification taken with the accompanying drawings in ,which" processhas been illustrated;

one form of',apparatus for carrying out: the

.'Inthe drawings.

view oftheferitire: apparatus, certain parts thereof'being illustratedin section and 3- Fig. 12 shows enlarged side elevation of the ejectorby ff'vvhich the air and condensation are withdrawn from the' dryingcylinder, a part of this devicejalso being il-x lustrate'd' in section.

chamber 10 from the main steam supply pipe 1 3 1eading from a boiler,"the pressure of the steam being preferablyfromi-l to 10 pounds. 'Theopposite end wall of the dry-" ing chamberhas aconduit 'l l leadingoutwardly therefrom and communicating with a casing '15 carriedby' theouter end therei, of ,The :casing hasan inner/,chamber 16 communicatingdirectly. with the conduit 14 "an another chamber separated therefrom,

bfa partitionm. An out-let pip 20 .Be it known that I, VENNINGQD.Simone,

. e7. to improvements 1n the casingv diverges," as sh v I the restrictedopening and an air vent pipe ...Figure 1 shows a somewhat diagi ammaticed in the end of the coupling. The water pipe '22, after passing throughthe plug 23, communicates with a'downwardly extending a pipe 2-1. Thispipe communicatesthrough an elbow 25' with a nozzle 26 of an ejectordesignatedgnerally bythe numeral 27.

This ejector comprises a casing 28 in which the nozzle 26" is mounted.

the interior of the casing '28 is provided with a restricted opening 80opposite the An outlet 29 opens downwardly beneath the nozzle and.

outletof the nozzle. Thea assage through n at 31,'beyond 32, open at itsupper end, communicates with sage communicates with an elbow 33connected to the endof the casing and this elbow is connected with thecoupling 21, previously described, through an upwardly extending thedivergeht passage 31. The divergent pasoutlet pipe '34. vThefwater whichpassesq through the pipe22 isconveyed downwardly. through the" pipe 24and discharged through the nozzle 26 at high velocity so that a suctioncreatedin the inlet opening 29 as the. stream passes through therestricted opening 30. This snction is adapted to draw the air andmoisture of-condensalocated adjacent the bottom-of the chamber,asillustrated in F1g.- 1, and the air,"moisture and-steam then passupwardly through the pipe 34 and are discharged through the pipe 20,into the. chamber 17 of the casing 15;

vThe contents of the chamber 1'7 ass downescape through' an upwardlyextending vent pipe'39having an automatic air vaIveAO at theupperend/thereof. Since the use lot the tion from the chamber lO, theejector. being ejecton makes 1 it A possible to I discharge -,thc

condensation and air with.af'greaterv pres'iv ,surethan that whichexists inthe drier, the

steam I which i's; carried vthroughzf into the} tank 38 "with thedischarged productsmay be returned to the drier and utilized in doinguseful work and for this purpose a pipe -41 is connected to the upperpart of the tank intro'tbuced into this coil through a pipe 49 whi leadsfrom the upper part of the re: ceiving tank 38 through a steam trap 50and the steam is discharged from the upper end of the coil 48 through apipe 51. The water is discharged from the upper end of the' heater 47through the pipe 52- which connects with the inlet pipe 22, previouslyde scribed. The centrifugal pump 44 creates a suitable pressure orheadof water forevercoming the friction of the pipe and discharging thewater through the ejector nozzle with sufficient ,force to perform thefunctions of removing the moisture and air from the drying chamber. Theheater serves to raise the temperature of the circulating water to apoint equal-to or slightly greater than that of the. steam in thedriers, thus preventing any tendency for condensation of the steam inthe driers or in the ejector and pipe connected thereto.

A portion of the water which collects in the tank 38 is conveyeddownwardly through a pipe 55 into a boiler feed pump 56 from which thewater is conveyed to the boiler through a feed pipe 57. The feed pump isoperated by steam which passes thereto through a pipe 58 and the flow ofsteam into this pump. is regulated by a valve 59. This valve is mountedon theend wall of the tank 38 and is operated by a float 60 whichregulates the opening and closing of the valve according to the level ofthe water in the receiving tank. When the waterrises above apredetermined limit, the float opens the valve and causes the pump 56 tooperate and thereby convey a portion of .the'water from the tank to theboiler. g

It will be understood that my-improved processand ap arat-us are notlimited except as defined by the appended claims.

I claim: Y I

1. The rocess of removing objectionable products I rom a paper machinedrier, which consists 1n passing a current of water in a channel throughsaid drier, creating a suction by said current; and thereby withdraw---ing said products with saidwater, separating the water irom the otherdischarged products, and. supplying-said current-with the water soseparated 2. The process of removingobjectionable products from apaper-machine drier con taining steam, which consists in creating asuction 1n sa1d drler and thereby wlthdrawand moisture with said water,separatin the air and water, heating a portion of sa i water andsupplying said ejector with said heated water.

from a paper machine drier which consists in creating a suction in acircuit having separate communications with the upper and lower parts ofsaid drier whereby said air and water are withdrawn together throughsaid circuit.

5. In apparatus of the classdescribed, a

drying chamber, an ejector located .in said chamber, means fordischarging a stream of water at high velocity in sald ejector-to createa suction, separate means connecting said ejector with the upper andlower parts of said chamber, and means for conveying from said chamberthe products discharged" by said ejector.

6; In apparatus of the class described, a drying chamber, an ejectorlocated in said chamber, means forpassing a stream of water through saidejector to create a suction therein, a receiving tank adapted'to receivethe products discharged by said ejector, and means for separatelywithdrawing certain of said dischar ed products and returning them tosaid drying chamber.

7.- In apparatus of the class described, a drying chamber, an ejectorlocated ,in sa d chamber, a water inlet pipe leading to sa d ejector, anoutlet conduit leadingfrom sald ejector, a receiving tank communicatingwith said outlet conduit, and -means for heating water withdrawn fromsaid receiving tank and returning it through said in let pipe to saidejector.

8. In apparatus of the class described, a

drying chamber, an ejector located in said i chamber, a water inlet.pipe leadingto said \..lector, an outlet conduit leading from said.

ejector, a receiving tank communicating with said out let conduit, meansfer heatin I water withdrawn from said recelving tank by steam suppliedfrom said receivin tank,

and means for conveying said heat water to said inlet pipe. 7

9. In apparatus of the class escribed, a drying chamber, an ejectorlocated in said chamber, means for passing a stream of water throughsaid ejector to create a suction therein a receivin tank adapted toreceive' the products by said l8.

80 4:. The process of extracting air and water ejector, and means forpermitting the separate withdrawal of air, steam and water from saidreceiving tank. Y

10. In apparatus of the class described, a drying chamber, an ejectorlocated in said chamber, an inlet pipe leading to said ejector,areceiving tank, an outlet conduit leading from said ejector to saidreceiving tank, and means for withdrawing water from said receiving tankand discharging it into said inlet pipe with suflicient velocity:

to create a suction in said ejector.

11. In apparatus of the class described, a drying chamber, an ejectorlocated in said chamber, an inlet pipe leading to said ejector, areceiving tank, an outlet conduit leading from said ejector to saidreceiving tank, means for withdrawing water from said receiving tank anddischarging it into said inlet pipe with sufiicient velocity to create asuction in said e ector, and means for heating the water withdrawn fromsaid receiving tank.

12. In apparatus of the class described,

# a drying chamber, an ejector located in said chamber, an inlet pipeleading to said ejector, a receiving tank, an outlet conduit leadingfrom said ejector to said receiving tank, means for withdrawing waterfrom said receiving tank and discharging it into said inlet pipe withsuflicient velocity to create a suction in said ejector, and means forseparating the steam discharged by said I conduit and conveying it fromsaid receiving tank'to said drying chamber.

13. In apparatus of the class described, a drying chamber, an ejectorlocated in said chamber, an inlet pipe leading to said ejector, areceiving tank, an outlet conduit leading from said ejector to saidrecelving tank, means for withdrawing water from said receiving tank anddischarging it into said inlet pipe with .suflicient velocity to createa suction in said ejector, and means for automatically regulating thelevel of the water in said receiving tank.

In testimony whereof, I have subscribed my name.

VENNING 1). smous.

